3-set books by Immanuel Kant, Friedrich Nietzsche, and David Hume

Sold as a 3-set. Bought for philosophy course for 80$. Groundwork for the Metaphysics of Morals by Immanuel Kant. On the Genealogy of Morals by Friedrich Nietzsche. An enquiry concerning human understanding by David Hume. I believe one of the books has some writing in pencil, can be erased. In good condition.